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https://issues.apache.org/jira/browse/HBASE-3999?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13444237#comment-13444237
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Doug Meil commented on HBASE-3999:
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Agree with closing.
> book.xml - Compression Upgrade Concerns
> ----------------------------------------
>
> Key: HBASE-3999
> URL: https://issues.apache.org/jira/browse/HBASE-3999
> Project: HBase
> Issue Type: Improvement
> Reporter: Doug Meil
> Assignee: Jean-Daniel Cryans
> Priority: Minor
>
> Spawned from comment on HBASE-3998
> (snip)
> Jean-Daniel Cryans added a comment - 16/Jun/11 18:00
> We should also add something about what happens when altering a family that
> was uncompressed to LZO or GZ, and vice versa. This just came up in the IRC
> channel: if I enable compression on a column family that was not previously
> compressed, what is needed to get the existing data in that column family
> compressed ?
> (snip)
> I'd suggest putting a new section under Appendix/Compression called something
> like "Upgrade Considerations" because this could either be compression
> algorithm upgrades (LZO->new version of LZO), or schema changes (as JD
> pointed out) where you are changing compression algorithms.
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